Description

IBM Cloud Pak for Business Automation could allow a remote attacker to bypass authorization and invoke restricted endpoints due to improper validation of HTTP headers.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.4",
  "pubDate": "2026-09-14T22:16:56.643Z",
  "pubdate": "2026-09-14T22:16:56.643Z",
  "executiveSummary": "This vulnerability involves an authorization bypass in IBM Cloud Pak for Business Automation resulting from insufficient validation of HTTP headers.\nThe flaw allows unauthenticated or unauthorized remote attackers to invoke restricted API endpoints that should otherwise be protected by access control mechanisms.\nBy manipulating specific HTTP headers, an attacker can circumvent security filters, potentially gaining unauthorized access to sensitive business automation data or administrative functionality.\nThe risk is critical due to the potential for complete compromise of restricted interface functionalities without requiring valid credentials.\nThe vulnerability affects IBM Cloud Pak for Business Automation, and exploitation requires network connectivity to the targeted service endpoint.\nNo user interaction is explicitly required for successful exploitation, making it a significant threat to internal and externally exposed infrastructure.\nOrganizations must prioritize the application of available security patches or configuration changes to enforce strict header validation and restore authorization integrity.",
  "technicalDetails": "The root cause of this vulnerability lies in the improper processing and sanitization of HTTP headers within the request handling pipeline of IBM Cloud Pak for Business Automation.\nThe application relies on specific header values to determine the security context and authorization status of incoming requests. Due to inadequate input validation, the underlying architecture fails to correctly verify the authenticity or integrity of these headers before routing the request to restricted business logic endpoints.\nExploitation occurs when an attacker crafts a malicious HTTP request by injecting or modifying specific header fields—such as those related to authentication tokens, proxy headers (e.g., X-Forwarded-For or X-Original-URL), or custom authorization headers—that the application incorrectly trusts during the authorization decision-making process.\nBy manipulating these headers, the attacker tricks the application's security middleware into bypassing authentication checks, essentially tricking the backend components into treating a restricted request as if it originated from an authorized or administrative source.\nThe attack flow proceeds as follows: First, the attacker identifies a restricted endpoint within the IBM Cloud Pak for Business Automation ecosystem. Second, the attacker probes the application to determine which HTTP headers are utilized for session or privilege validation. Third, the attacker transmits a crafted request, incorporating the malicious header values that successfully masquerade as a legitimate request. Finally, the server-side component processes the request, fails to perform deep inspection of the header, and executes the requested operation with elevated or unauthorized privileges.\nBecause the vulnerability occurs at the protocol/header handling layer, it affects the communication interface between the client and the backend services. The exploit does not require prior knowledge of legitimate user sessions, as the bypass operates by subverting the trust mechanism itself rather than stealing existing tokens.\nThe impact of this vulnerability is significant, as it grants unauthorized actors the ability to interact with restricted endpoints, which may include functions for modifying business processes, accessing confidential automation workflows, or altering system configurations. Post-exploitation, an attacker could potentially lead to data exfiltration, service disruption, or unauthorized workflow execution depending on the specific functionality exposed via the bypassed endpoints."
}